<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
	$(function(){
		$("body").append(
			"<input type='button' class='testclass2' value='btn2' />"
		);
		$("input.testclass2").click(function(){
			alert($(this).attr("class"))
		});
	});
</script>
</head>
<body>
<input type="button" class="testclass" value="btn" />
</body>
</html>